<html>
  <head>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
    <title>小黑记事本</title>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
    <meta name="robots" content="noindex, nofollow" />
    <meta name="googlebot" content="noindex, nofollow" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <link rel="stylesheet" type="text/css" href="../css/index.css" />
  </head>

  <body>
    <!-- VUE示例接管区域 -->
    <section id="app">

      <!-- 输入框 -->
      <header class="header">
        <h1>VUE记事本</h1>
        <input
          autofocus="autofocus"
          autocomplete="off"
          placeholder="输入日程"
          class="new-todo"
          v-model="inputValue"
          @keyup.enter="add()"
        />
      </header>

      <!-- 列表区域 -->
      <section class="main">
        <ul class="listview">
          <li class="todo" v-for="(item,ind) in list">
            <div class="view">
              <span class="index">{{ind+1}}</span> <label>{{item}}</label>
              <button class="destroy" @click="del(ind)"></button>
            </div>
          </li>
        </ul>
      </section>
       <!-- 统计和清空 -->
       <footer class="footer">
        <span class="todo-count"> <strong>{{list.length}}</strong> items left </span>
        <button class="clear-completed" @click="removeAll()">
          Clear
        </button>
      </footer>
    </section>
    
    <!-- 开发环境版本，包含了有帮助的命令行警告 -->
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>

     <script type="text/javascript">
         var vue =new Vue({
            el:"#app",
            data:{
              inputValue: "",
              list:["写代码","吃饭","睡觉"]
            },
            methods:{
               add(){
                  //往集合添加数据
                 console.info("inputValue==="+this.inputValue)
                  this.list.push(this.inputValue)
                  console.info(this.list)
               },
               del(v){
                 console.info(v);
                 // 集合中删除元素 splice  删除元素下标，删除几个
                 this.list.splice(v,1);
               },
               removeAll(){
                this.list =[];
               }
            }

         });

     </script>

  </body>
</html>
